Electric heater.



W. BARSTOW.

ELECTRIC HEATER.

uruonlox nun IAY 21, 1912.

1,052,997. Patented Feb. 11, 1913.

p O O O O O o o o 04.0 c J INVENTOR WITNESSES 74.56, king ATTORNEYUNITED STATES PATENT OFFICE ELECTRIC HEATER.

Application filed May 21,

Specification of Letters Patent.

Patented Feb. 11, 1913.

1912. Serial No. 698,816.

1 0 all whom it may concern.

Be it known that I, \Vnron BARSTOW, a citizen of the United States,rcsidim at San Francisco, in the county of San l rancisco and State ofCalifornia, have invented new and useful Improvements in ElectricHeaters, of which the following is a specification.

The object of the present invention is to provide an effective form ofelectric heater for rapidly heating the air of an apartment, railroadcar, or the like.

In the accompanying drawing, Figure 1 is a vertical cross section of theheater; Fig. 2 is a side view thereof; Fig. 3 is a horizontal sectionthereof.

Referring to the drawing, 1 indicates a wall of an apartment, car, orthe like, to which are secured by screws 2, or in any suitable manner,bands I) which are clamped around a cylindrical pipe 4, somewhatresembling in form and size a joint of an ordinary stove pipe. The lowerend of said pipe is closed by a circular plate (3, the rim of which is,as shown at 7, beaded over the outwardly bent. edge ot the lower end ofthe cylindrical pipe -'l-, and to said plate is riveted an asbestoshoard terminal block 8, through which pass terminals 5) to which aresecured wires 11 leading from any suitable source of supply ofelectricity. Upon said lower plate (3 are supported, at right. angles toone another, vertical mica sheets 12, each sheet being slitted verticallfrom the. center of a horizontal edge t iercot' to about the middle, theslit. 13 of one sheet extending from the lower edge upward, and that 1 1of the other sheet from the upper edge downward, the slitted portion ofeach sheet being passed over the unslitted vertical central portion ofthe other sheet. Near their outer vertical edges said sl'iects areformed with a Vertical series of small apertures lti. A high resistancewire 17 is connected to one terminal 9 and is passed in successionthrough the lowermpst aperture in each sheet, and then successivelythrough higher apertures therein, tinally passing through the uppermostaperture of one of the sheets and then connected, to the other terminal.9. The pipe it is formed in the lower portion. not higher than the micasheets, with a number of apertures 18 allowing air to enter.

The mode of operation of the device will be readily understood from theforegoing description. \Vhen electricity is caused to pass through thehigh resistance wire, said wire becomes highly heated, heating theadjacent air and causing it to rise in the pipe and flow out from thetop thereof. its place being supplied by air (lowing through the iapertures '18 and impinging againstv the highly heated wire, which is inturn heated and flows to the upper portion of the pipe.

I claim 1. In combination with a conduit open at the top and having anaperture at the bottoln, a coil of high resistance wire within saidpipe, and vertical sheets of mica sup ported within the pipe andcrossing each other, and supporting said coil.

2. vIn combination with a cylinder, open at, the top and having aplurality of openings in the lower portion. means for closing the bottomof the cylinder, two terminals carried by said means, vertical micasheets supported upon said nu-ans, and extending as high as said lowerportion and having a large number of apertures in their vertical edges,and a coil of high resistance wire connected to said terminals andpassing snccessively through said apertures.

In testimony whereot l have hereunto set my hand in the presence of twosub scribing witnesses.

WELOII BARSTOW.

Witnesses FRANCIS M. Wmon'r, D. B. Rion'mos.

